Over 500GB of Sensitive Great Firewall of China Data Leaked Online

A massive data breach has exposed the inner workings of China’s internet censorship system, with over 500GB of sensitive documents from the Great Firewall of China (GFW) leaked online on September 11, 2025.

This represents the largest leak of internal GFW documents in history, providing unprecedented insight into China’s digital surveillance apparatus.

Breach Origins

The leaked data originated from two key organizations behind China’s internet censorship infrastructure: Geedge Networks and the MESA Lab at the Institute of Information Engineering, Chinese Academy of Sciences.

Geedge Networks, led by chief scientist Fang Binxing—known as the “Father of the Great Firewall”—serves as a core technical force supporting the GFW’s operations.

The breach encompasses approximately 600GB of data, including source code, work logs, internal communications, and development records.

The largest component, a mirror/repo.tar file containing RPM packaging server archives, accounts for 500GB alone.

Additional leaked materials ...